We go to Harvest Point off Jonesboro Road and 75 (we meet in the building behind the flea market). It's a United Methodist church but probably the most A-typical UMC if you've ever been to one. The dress is casual (some people still dress up but don't feel obligated to). The praise and worship is good - no hymns so if that's your forte, keep this in mind. The pastor is great - he's really a teacher more than a preacher. The average Sunday service is probably a couple of hundred people plus kids. So not too small but not too big. We also have 'life' groups that meet throughout the week at people's homes. Or if you're like us and don't have time during the week, they also have Sunday-morning groups that meet before church. This is just a good way to get connected with a smaller group of folks and dig a little deeper into God's Word.
My husband and I work with the youth on Wednesday nights. Our normal crowd is about 50-60 youth. We hang out, eat, play games, a bunch of kids skateboard (not sure if your son is into that or not), have worship and then break into high school and middle school groups.
We went to a non-denominational church on the north side of town for many years. When we decided we really need a church closer to home, we visited a lot of churches and then narrowed our choice down to the 2-3 we liked with the assumption we were going to visit each of those for one month before deciding where we really wanted to stay. Harvest Point was one of the two we really liked but by the end of our first month there, we decided we were 'home'.
We always laugh about it though because I grew up in a United Methodist church and my husband never liked 'my' church and now we've ended up at a UMC anyway. They're just all a little different so it's hard to judge them just by their title so even though you were raised Baptist, I encourage you to give other denominations a visit.